メタデータ
| 項目 |
値 |
| Designation |
C/1985 T1 (Thiele) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1985-12-19T05:04:22.480320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:33Z |
| Obs used |
133 |
| NEO |
- |
| M1 |
9.900 |
| K1 |
13.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1985-12-16.0000000 |
| e |
0.98328249 |
| q (au) |
1.317141 |
| a (au) |
78.788093 |
| i (deg) |
139.069283 |
| Ω (om, deg) |
53.012812 |
| ω (w, deg) |
53.000230 |
| M (ma, deg) |
359.995474 |
等級
散乱 + 全体線形
$$
M_a = (6.369 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.369 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
12:35:26.61 |
-30:20:52.6 |
HIP 61452 |
15.90 |
| 2026-09-20 12:00 |
12:35:28.58 |
-30:21:00.2 |
HIP 61452 |
15.98 |
| 2026-09-21 00:00 |
12:35:30.57 |
-30:21:07.9 |
HIP 61452 |
16.08 |
| 2026-09-21 12:00 |
12:35:32.55 |
-30:21:15.7 |
HIP 61452 |
16.19 |
| 2026-09-22 00:00 |
12:35:34.54 |
-30:21:23.6 |
HIP 61452 |
16.31 |
| 2026-09-22 12:00 |
12:35:36.53 |
-30:21:31.7 |
HIP 61452 |
16.44 |
| 2026-09-23 00:00 |
12:35:38.52 |
-30:21:39.8 |
HIP 61452 |
16.59 |
| 2026-09-23 12:00 |
12:35:40.52 |
-30:21:48.1 |
HIP 61452 |
16.76 |
| 2026-09-24 00:00 |
12:35:42.52 |
-30:21:56.6 |
HIP 61452 |
16.93 |
| 2026-09-24 12:00 |
12:35:44.52 |
-30:22:05.1 |
HIP 61452 |
17.12 |
| 2026-09-25 00:00 |
12:35:46.53 |
-30:22:13.8 |
HIP 61452 |
17.32 |
| 2026-09-25 12:00 |
12:35:48.53 |
-30:22:22.6 |
HIP 61452 |
17.53 |
| 2026-09-26 00:00 |
12:35:50.54 |
-30:22:31.5 |
HIP 61452 |
17.75 |
| 2026-09-26 12:00 |
12:35:52.55 |
-30:22:40.5 |
HIP 61452 |
17.99 |
| 2026-09-27 00:00 |
12:35:54.57 |
-30:22:49.6 |
HIP 61452 |
18.23 |
| 2026-09-27 12:00 |
12:35:56.58 |
-30:22:58.9 |
HIP 61452 |
18.49 |
| 2026-09-28 00:00 |
12:35:58.60 |
-30:23:08.3 |
HIP 61452 |
18.75 |
| 2026-09-28 12:00 |
12:36:00.62 |
-30:23:17.7 |
HIP 61452 |
19.02 |
| 2026-09-29 00:00 |
12:36:02.64 |
-30:23:27.4 |
HIP 61452 |
19.31 |
| 2026-09-29 12:00 |
12:36:04.66 |
-30:23:37.1 |
HIP 61452 |
19.60 |
| 2026-09-30 00:00 |
12:36:06.68 |
-30:23:46.9 |
HIP 61452 |
19.90 |
| 2026-09-30 12:00 |
12:36:08.70 |
-30:23:56.9 |
HIP 61452 |
20.21 |
| 2026-10-01 00:00 |
12:36:10.73 |
-30:24:06.9 |
HIP 61452 |
20.52 |
| 2026-10-01 12:00 |
12:36:12.75 |
-30:24:17.1 |
HIP 61452 |
20.85 |
| 2026-10-02 00:00 |
12:36:14.78 |
-30:24:27.4 |
HIP 61452 |
21.18 |
| 2026-10-02 12:00 |
12:36:16.80 |
-30:24:37.8 |
HIP 61452 |
21.52 |
| 2026-10-03 00:00 |
12:36:18.83 |
-30:24:48.3 |
HIP 61452 |
21.86 |
| 2026-10-03 12:00 |
12:36:20.86 |
-30:24:59.0 |
HIP 61452 |
22.21 |
| 2026-10-04 00:00 |
12:36:22.88 |
-30:25:09.7 |
HIP 61452 |
22.57 |
| 2026-10-04 12:00 |
12:36:24.91 |
-30:25:20.5 |
HIP 61452 |
22.93 |
| 2026-10-05 00:00 |
12:36:26.94 |
-30:25:31.5 |
HIP 61452 |
23.30 |
| 2026-10-05 12:00 |
12:36:28.96 |
-30:25:42.6 |
HIP 61452 |
23.67 |
| 2026-10-06 00:00 |
12:36:30.99 |
-30:25:53.7 |
HIP 61452 |
24.05 |
| 2026-10-06 12:00 |
12:36:33.01 |
-30:26:05.0 |
HIP 61452 |
24.44 |
| 2026-10-07 00:00 |
12:36:35.04 |
-30:26:16.4 |
HIP 61452 |
24.82 |
| 2026-10-07 12:00 |
12:36:37.06 |
-30:26:27.9 |
HIP 61452 |
25.22 |
| 2026-10-08 00:00 |
12:36:39.08 |
-30:26:39.5 |
HIP 61452 |
25.61 |
| 2026-10-08 12:00 |
12:36:41.10 |
-30:26:51.2 |
HIP 61452 |
26.01 |
| 2026-10-09 00:00 |
12:36:43.12 |
-30:27:03.0 |
HIP 61452 |
26.42 |
| 2026-10-09 12:00 |
12:36:45.14 |
-30:27:14.9 |
HIP 61452 |
26.83 |
| 2026-10-10 00:00 |
12:36:47.15 |
-30:27:26.9 |
HIP 61652 |
26.55 |
| 2026-10-10 12:00 |
12:36:49.16 |
-30:27:39.0 |
HIP 61652 |
26.10 |
| 2026-10-11 00:00 |
12:36:51.17 |
-30:27:51.2 |
HIP 61652 |
25.64 |